Trane 4TWV0024A1000A Installer's Manual page 13

Table 15. Braze the Refrigerant Lines (continued)
4. Wrap a wet rag around the valve body to avoid heat damage and
continue the dry nitrogen purge.
5. Braze the refrigerant lines to the service valves.
a. For Units shipped with a field-installed external drier, check
liquid line filter drier's directional flow arrow to confirm
correct direction of refrigeration flow (away from outdoor unit
and toward evaporator coil) as illustrated. Braze the filter
drier to the Liquid Line.
6. Continue the dry nitrogen purge. Do not remove the wet rag until
all brazing is completed.
Important: Remove the wet rag before stopping the dry nitrogen
purge.
Note: Precautions should be taken to avoid heat damage to base pan
during brazing. It is recommended to keep the flame directly
off of the base pan.
7. Replace the pressure tap valve cores after the service valves have
cooled.
18-BC89D1-1D-EN
R R e e f f r r i i g g e e r r a a n n t t L L i i n n e e B B r r a a z z i i n n g g
3-4" fro m va lve
13